Fit and fashionable Kelly Osbourne

Ann Johansson / For The Times; ABC

Season 9 contestant Kelly Osbourne is now a fashion maven, hitting red carpets in the latest designs and serving as a commentator on E!'s "Fashion Police" with Joan Rivers. Her dance partner, Louis van Amstel, taught her about nutrition during her season, which prompted her to lose 20 pounds and make it to the final three. "He made me eat turkey burgers and salads and explained to me that a high-protein, low-carb diet would keep me energized," she told Shape magazine. "Then I started losing weight and realized, 'Oh, it's true what they say: Diet and exercise really work!' "

Season 9 contestant Kelly Osbourne is now a fashion maven, hitting red carpets in the latest designs and serving as a commentator on E!'s "Fashion Police" with Joan Rivers. Her dance partner, Louis van Amstel, taught her about nutrition during her season, which prompted her to lose 20 pounds and make it to the final three. "He made me eat turkey burgers and salads and explained to me that a high-protein, low-carb diet would keep me energized," she told Shape magazine. "Then I started losing weight and realized, 'Oh, it's true what they say: Diet and exercise really work!' " (Ann Johansson / For The Times; ABC)

Season 9 contestant Kelly Osbourne is now a fashion maven, hitting red carpets in the latest designs and serving as a commentator on E!'s "Fashion Police" with Joan Rivers. Her dance partner, Louis van Amstel, taught her about nutrition during her season, which prompted her to lose 20 pounds and make it to the final three. "He made me eat turkey burgers and salads and explained to me that a high-protein, low-carb diet would keep me energized," she told Shape magazine. "Then I started losing weight and realized, 'Oh, it's true what they say: Diet and exercise really work!' "